Gravity Force (1989)

Gravity Force is a game of dexterity. Your task is to pilot a small spaceship through a series of mazes and collect various cargo containers on your way. Your spaceship obeys the laws of gravity. You have to use a single thruster to avoid collision with walls or the ground. Various types of enemies will try to hinder your cargo salvage missions. The single player part of the game consists of a total of 49 mazes. After each five successfully finished levels you will receive a password that allows you to choose the corresponding level as your starting point in the main menu. The ten highest scores achieved will be permanently saved on disk.